West Ham United's Angelo Ogbonna headed a second-half winner to give David Moyes' side a hard-fought Premier League victory at Everton.
In a game of few clear-cut chances, defender Ogbonna netted the only goal in the 74th minute, rising inside the six-yard box to flick home Jarrod Bowen's corner.
The Hammers dominated the first half but lacked incisiveness in the final third and called Jordan Pickford into action just once.
The England keeper palmed out Bowen's stinging shot while Tomas Soucek thought he had found the breakthrough with his follow-up from close range but it was ruled out for offside.